Merge experimental desktop branch

[5rahim]

Current progress:

• [x] New release workflow
  • Workflow maintains same artifact style. Migration away from GoReleaser.
• [x] Working sidecar logic
• [x] Platform-specific title bars
• [x] Desktop-specific web interface built at runtime using environment variables
• [ ] Update logic
  • To do: Kill sidecar before installing update, test update using release build.